The Nikon EN-EL18a is a higher capacity battery for the Nikon D4 & D4s.
Our D4 / D4s cameras ship with one fully charged battery and charger. Order this only if you want an additional battery (or two). The rental of this battery does not include a charger. If you need a charger (in addition to the one that comes with a rented camera), you’ll want the Nikon MH-26a.
Please Note: Spare batteries are not sent with the BL-6 Battery Chamber cover.